BP Environmental management systems
http://www.bp.com/sectiongenericarticle.do?categoryId=2011367&contentId=2016619
"Corrosion management
BPXA spends about $50 million annually to monitor, locate, repair and manage the effects of corrosion that occurs when an electrochemical process breaks down steel. On Alaska's North Slope, we operate thousands of steel vessels and most of the 1,600-plus miles of pipelines that carry oil, water and gas from wellsites through processing facilities and ultimately to sales or injection points. We semi-annually review our corrosion plan with the state Department of Environmental Conservation. Under the plan, corrosion managers direct corrosion mitigation resources to protect and extend the life of the assets.
Internal corrosion rates have declined 90% since 1992. The annual inspection program consists of approximately 100,000 locations. Internal corrosion inspections have remained relatively constant with about 60,000 inspections per year. The external corrosion program was substantially increased in 2002 from the historical level of more than 13,000 locations per year to about 35,000 locations in 2003. External corrosion was the cause of a 6,000-gallon oil and water spill in Prudhoe Bay in May 2003. The line was shut down for several days and repaired, and crews completed site cleanup. BP has committed to the state oversight agency to gather soil and water samples to assess the natural attenuation of the site through the summer of 2005.
Systems and system narratives are great.Actual recordkeeping of what really happened will be more important in the criminal investigation.